Gather information.................................................................................................................................... 51

Chapter 7: Emergency recovery trees..............................................................................

Emergency recovery trees........................................................................................................................ 53

Navigation................................................................................................................................................. 54

Corruption of flash..................................................................................................................................... 55

Corruption of flash recovery tree...................................................................................................... 55

Incorrect PVID........................................................................................................................................... 56

Incorrect PVID recovery tree............................................................................................................ 57

VLAN not tagged to uplink ports............................................................................................................... 57

VLAN not tagged to uplink ports recovery tree................................................................................. 58

SNMP........................................................................................................................................................ 60

SNMP recovery tree......................................................................................................................... 60

Stack......................................................................................................................................................... 62

Stack recovery tree.......................................................................................................................... 63

Dynamic Host Configuration Protocol (DHCP) relay................................................................................. 68

DHCP recovery tree......................................................................................................................... 68

AAUR: configuration for the units in the stack is not saved on the base unit............................................ 69

Configuration for the units in the stack is not saved on the base unit recovery tree........................ 70

AAUR: Both units display yes for Ready for Replacement....................................................................... 72

Both units display yes for Ready for Replacement recovery tree..................................................... 72

DAUR........................................................................................................................................................ 74

Diagnostic image transfer does not start recovery tree.................................................................... 74

Stack Forced Mode................................................................................................................................... 76

You cannot access a switch at the stack IP address using ping, Telnet, SSH, Web, or DM recovery

tree................................................................................................................................................... 76

Stack Health Check: Cascade Up and Cascade Down columns display LINK DOWN or MISSING........ 77

Cascade Up and Cascade Down columns display LINK DOWN or MISSING recovery tree........... 78

Stack Health Check: Cascade Up and Cascade Down columns display UP WITH ERRORS................. 80

Cascade Up and Cascade Down columns display UP WITH ERRORS recovery tree.................... 80

Chapter 8: General troubleshooting of hardware............................................................

Work flow: General troubleshooting of hardware...................................................................................... 83

Check power............................................................................................................................................. 85

Task flow: Check power................................................................................................................... 85

Ensuring the power cord is installed................................................................................................. 87

Observing an error report on the console......................................................................................... 87

Reloading the agent code................................................................................................................ 87

Replacing the power cord................................................................................................................. 88

Returning the unit for repair.............................................................................................................. 88

Check cables............................................................................................................................................. 88

Task flow: Check cables................................................................................................................... 88

Confirming if the cables are the correct type.................................................................................... 89

Reviewing stacking configuration documentation............................................................................ 90

Check port................................................................................................................................................. 90

Troubleshooting Avaya ERS 4000 Series

April 2014

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